.choose-banner{
    position: relative;
    width: 1920px;
    height: 880px;
    overflow: hidden;
    border-radius: 5px;
}
.img{
    position: absolute;
    top: 0;
    width: 1920px;
    height: 880px;
    transition: all 0.5s;
    background-size: cover;
}
input{
    position: relative;
    z-index: 100;
    display: none;
}
.select{
    position: absolute;
    bottom: 10px;
    left: 50%;
    transform: translateX(-50%);
    width: 60px;
    height: 10px;
    z-index: 1;
    display: flex;
    justify-content: space-between;
    align-items: center;
}
.select>label{
    width: 10px;
    height: 10px;
    background-color: rgb(143, 53, 53);
    border-radius: 50%;
    cursor: pointer;
    border: 1.5px solid white;
}
.img1{
    background-image: url("../img/banner.jpg");
}
.img2{
    background-image: url("../img/banner2.jpg");
    left: 100%;
}
.choose-banner input:nth-of-type(1):checked ~ .select label:nth-of-type(1){
    background-color: rgba(241, 236, 236, 0);
}
.choose-banner input:nth-of-type(2):checked ~ .select label:nth-of-type(2){
    background-color: rgba(255, 255, 255, 0);
}
.choose-banner input:nth-of-type(1):checked ~ .img{
    transform: translateX(0);
}
.choose-banner input:nth-of-type(2):checked ~ .img{
    transform: translateX(-100%);
}
.heading{
    padding: 25px;
}
.index-top>div:nth-child(2){
    position:absolute;
    top: 0;
    left:100px;
}
.index-top>div:nth-child(2){
    position:absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 140px;
    background-color: black;
}
.index-top>div:nth-child(1)>div:nth-child(1)>div{
    margin: 20px 0 0 0;
}
.logo{
    background-image: url("../img/qwol.png");
    background-size: 100% 100%;
    width: 70px;
    height: 63px;
    margin: 0 0 0 20px;
}
.title{
    padding: 0 0 0 20px;
}
.title>div:nth-child(2){
    font-size: 5px;
    color: grey;
    width: 190px;
}
.title>div:nth-child(1)>div:nth-child(1){
    color: white;
}
.title>div:nth-child(1)>div:nth-child(2){
    color: rgb(107,185,14);
    padding: 0 0 0 20px;
}
.style{
    margin: 20px 0;
    border-right: 1px solid rgb(77, 74, 74);
}
.mailbox>div:nth-child(1){
    background-image: url("../img/qur3.png");
    height: 50px;
    width: 50px;
    background-size: 100% 100%;
}
.mailbox>div:nth-child(2)>div{
    color: white;
    padding: 5px 10px;
}
.phone>div:nth-child(1){
    background-image: url("../img/phone.png");
    width: 50px;
    height: 50px;
    background-size: 100% 100%;
}
.phone>div:nth-child(2)>div{
    color: white;
    padding: 5px 10px;
}
.callus > div {
    margin: 0 10px 0 10px;
}
.callus>div img{
    width: 50px;
    height: 50px;
    background-size: 100% 100%;
}
.callus > div:nth-child(1):hover {
    /*background-image: url("");*/
    width: 50px;
    height: 50px;
    background-size: 100% 100%;
    content: url("../img/qq2.png");
}

.callus > div:nth-child(2):hover {
    /*background-image: url("");*/
    width: 50px;
    height: 50px;
    background-size: 100% 100%;
    content: url("../img/pjg7.png");
}

.callus > div:nth-child(3):hover {
    /*background-image: url("");*/
    width: 50px;
    height: 50px;
    background-size: 100% 100%;
    content: url("../img/weibo2.png");
}
.nav{
    background-color: green;
    width: 1200px;
    height: 50px;
    margin: 0 0 0 100px;
}
.nav {
    display: flex;
}

.nav > div {
    /*两个参数：上下内边距   左右内边距*/
    padding: 0 45px;
    height: 50px;
    /*    要让字体上下居中  行高*/
    line-height: 50px;
    cursor: pointer;
    color: white;
}

/*鼠标移动到div上面可以变背景颜色 hover*/
.nav > div:hover {
    background-color: white;
    /*字体颜色*/
    color: black;
}
.nav>div:nth-child(8){
    background-color: white;
    cursor: auto;
}

.nav>div:nth-child(8)>div:nth-child(2){
    background-image: url("../img/fdj1.png");
    width: 30px;
    height: 28px;
    background-size: 100% 100%;
}

.nav>div:nth-child(8)>div:nth-child(2):hover{
    content: url("../img/fdj2.png");
    cursor: pointer;
}
.slogan{
    background-color: rgba(204,193,175,0.3);
    width: 820px;
    height: 150px;
    margin: 150px 200px 0 200px;
    padding: 0 40px;
    text-align: center;
}
.slogan>div:nth-child(1){
    font-size: 30px;
    color: white;
}
.slogan>div:nth-child(2){
    font-size: 40px;
    color: white;
}
.slogan>div:nth-child(3){
    color: white;
}
.mid>div:nth-child(1)>div:nth-child(1)>div:nth-child(1){
    color: green;
    font-size: 30px;
}
.mid>div:nth-child(1)>div:nth-child(1)>div:nth-child(2){
    color: grey;
    font-size: 20px;
}
.mid>div:nth-child(3)>div:nth-child(1){
    background-image: url("../img/bg.jpg");
    width: 1920px;
    height: 500px;
    background-size: 100% 100%;
}
.ad-left{
    border: 1px solid white;
    height: 500px;
    width: 970px;
}
.ad-left>div:nth-child(1)>div:nth-child(2){
    color: green;
}
.ad-left>div:nth-child(2){
    color: grey;
}
.ad-right{
    border: 1px solid white;
    height: 460px;
    width: 970px;
    padding: 20px 0 20px 200px;
    display: flex;
}
.font-60{
    font-size: 60px;
    color: green;
    padding: 0 0 400px 0;
    margin: 0 50px 0 0;
}
.ad-right>div:nth-child(2)>div{
    color: white;
}
.ad-right>div:nth-child(2)>div:nth-child(1){
    padding: 0 0 50px 0;
}
.ad-right>div:nth-child(2)>div:nth-child(2){
    padding: 0 0 50px 0;
}
.ad-right>div:nth-child(2)>div:nth-child(3)>div:nth-child(2){
    border: 1px solid white;
    margin: 0 0 0 40px;
    padding: 83.5px 20px;
}
.ad-right>div:nth-child(2)>div:nth-child(3)>div:nth-child(2):hover{
    cursor: pointer;
}
.project-case>div:nth-child(1)>div:nth-child(1)>div:nth-child(2){
    color: rgb(94,194,20);
}
.project-case .font-20{
    color: rgb(216,216,216);
}
.project-case>div:nth-child(2){
    display: flex;
    flex-wrap: wrap;
    justify-content: space-between;
    width: 1280px;
    margin: 0 0 0 300px;
}
.project-case>div:nth-child(3){
    margin: 20px 900px;
    padding: 5px 20px;
    border: 1px solid rgb(216,216,216);
    width: 100px;
}
.project-case>div:nth-child(3):hover{
    cursor: pointer;
}
.news{
    background-image: url("../img/1920.jpg");
    width: 1920px;
    height: 740px;
    background-size: 100% 100%;
}
.join-us>div:nth-child(1)>div:nth-child(1){
    font-size: 40px;
}
.join-us>div{
    color: white;
}
.join-us>div:nth-child(1){
    padding: 0 0 40px 0;
}
.join-us>div:nth-child(3){
    padding: 0 0 40px 0;
}
.join-us>div:nth-child(3)>div{
    border: 1px solid rgb(216,216,216);
    padding: 10px 40px;
}
.join-us>div:nth-child(3)>div:hover{
    cursor: pointer;
    background-color: #00bb00;
}
.new{
    background-color: white;
    height: 800px;
}
.new>div:nth-child(1)>div:nth-child(1)>div:nth-child(1)>div:nth-child(2){
    color: #00bb00;
    font-size: 30px;
}
.new>div:nth-child(1)>div:nth-child(1)>div:nth-child(2){
    color: rgb(216,216,216);
}
.new>div:nth-child(1)>div:nth-child(1){
    padding: 10px 0 10px 0;
}
.new>div:nth-child(1)>div:nth-child(2){
    padding: 20px 0;
}
.news-content-style{
    height: 80px;
    width: 500px;
    margin: 0 20px 15px 300px;
    border-bottom: 1px solid rgb(216,216,216);
}
.news-content-style:hover{
    cursor: pointer;
}